GNU Anubis

An SMTP message submission daemon.

GNU Anubis Version 4.3

5 January 2024

Wojciech Polak and Sergey Poznyakoff

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, with the Front-Cover texts being “A GNU Manual”, and with the Back-Cover Texts as in (a) below. A copy of the license is included in the section entitled “GNU Free Documentation License”.

(a) The FSF’s Back-Cover Text is: “You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development.”

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GNU Anubis

This edition of the GNU Anubis Manual, last updated 5 January 2024, documents GNU Anubis Version 4.3.

Appendices
1 Overview	Program Overview.
2 Glossary of Frequently Used Terms	Frequently Used Terms Explained.
3 Authentication	Authenticating Incoming Connections.
4 Configuration	Writing your Configuration Files.
5 The Rule System	How to Use the Rule System.
6 Invoking GNU Anubis	How to Invoke the GNU `anubis`.
7 Quick Start	A Quick Start Example.
8 Using the TLS/SSL Encryption	Using TLS/SSL Encryption.
9 Using S/MIME Signatures
10 Using Anubis to Process Incoming Mail	Processing Incoming Mail.
11 Using Mutt with Anubis	Using Anubis with Mutt.
12 Reporting Bugs
Appendix A Pixie & Dixie	Original description of the new GNU Anubis operation mode.
Appendix B Multi-Part Message Processing	New Method of Processing Multi-Part messages.
Appendix C GNU Free Documentation License	This manual is under the GNU Free Documentation License. Indices
Concept Index	Index of concepts.
— The Detailed Node Listing — Auth mode.
3.1 Auth Service
3.2 User Database
3.3 Database URL
3.4 Managing the Database
Database URL
3.3.1 Plain text databases
3.3.2 Databases in GDBM format
3.3.3 MySQL and PostgreSQL	MySQL and PostgreSQL databases
Managing the Database
3.4.1 Administrators	Administrator’s View
3.4.2 Users	User’s View
Administrators
3.4.1.1 Creating the Database
3.4.1.2 Listing Database Records
3.4.1.3 Adding New Records
3.4.1.4 Removing Existing Records
3.4.1.5 Modifying Existing Records
3.4.1.6 Summary of All Administrative Commands
Logical Structure
4.1 AUTH Section
4.2 CONTROL Section
4.3 TRANSLATION Section
4.4 GUILE Section
CONTROL Section
4.2.1 Basic Settings
4.2.2 Output Settings
4.2.3 SOCKS Proxy
4.2.4 ESMTP Authentication Settings
4.2.5 Encryption Settings
4.2.6 Security Settings
The Rule System
5.1 Actions
5.2 Conditional Statements
5.3 Triggers
5.4 Boolean Operators
5.5 Regular Expressions
5.6 Action List
5.7 Using Guile Actions
Conditional Statements
5.2.1 Concatenations
Action List
5.6.1 Stop Action	Stopping Processing
5.6.2 Call Action	Invoking Another Section
5.6.3 Adding Headers or Text	How to add a new header or body line(s).
5.6.4 Removing Headers	How to remove a message header line(s).
5.6.5 Modifying Messages	How to modify a message contents on-the-fly.
5.6.6 Modifying SMTP Commands
5.6.7 Inserting Files	How to append text files to an outgoing message.
5.6.8 Mail Encryption	How to encrypt a message on-the-fly.
5.6.9 Using an External Processor	How to process a message body using an external tool.
5.6.10 Quick Example	A quick example of using an action list.
Using Guile Actions
5.7.1 Defining Guile Actions
5.7.2 Invoking Guile Actions
Predefined Guile Actions
5.7.3 Support for ROT-13
5.7.4 Remailers Type-I
5.7.5 Entire Message Filters
Using Mutt with Anubis
11.1 Configure Mutt SMTP	Using SMTP
11.2 Using GNU mailutils as an interface to mutt	Using GNU Mailutils
11.3 Using msg2smtp.pl as an interface to mutt	Using `msg2smtp.pl`

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